Selecting macroblock coding modes for video encoding

a coding mode and macroblock technology, applied in the field of video coding, can solve the problem of very intensive computation of the rate-distortion optimized coding mode decision
US20050276493A1Inactive Publication Date: 2005-12-15MITSUBISHI ELECTRIC RES LAB INC
3 Cites 101 Cited by

Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
MITSUBISHI ELECTRIC RES LAB INC
Publication Date
2005-12-15
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A method selects an optimal coding mode for each macroblock in a video. Each macroblock can be coded according a number of candidate coding modes. A difference between an input macroblock and a predicted macroblock is determined in a transform-domain. The difference is quantized to yield a quantized difference. An inverse quantization is performed on the quantized difference to yield a reconstructed difference. A rate required to code the quantized difference is determined. A distortion is determined according to the difference and the reconstructed difference. Then, a cost is determined for each candidate mode based on the rate and the distortion, and the candidate coding mode that yields a minimum cost is selected as the optimal coding mode for the macroblock.
Need to check novelty before this filing date? Find Prior Art

Description

RELATED APPLICATION

[0001] This application is related to U.S. patent application Ser. No. ______, “Transcoding Videos Based on Different Transformation Kernels” co-filed herewith by Xin et al., on Jun. 1, 2004, and incorporated herein by reference.FIELD OF THE INVENTION

[0002] The invention relates generally to video coding and more particularly to selecting macroblock coding modes for video encoding. BACKGROUND OF THE INVENTION

[0003] International video coding standards, including MPEG-1, MPEG-2, MPEG-4, H.261, H.263 and H.264 / AVC, are all based on a basic hybrid coding framework that uses motion compensated prediction to remove temporal correlations and transforms to remove spatial correlations.

[0004] MPEG-2 is a video coding standard developed by the Motion Picture Expert Group (MPEG) of ISO / IEC. It is currently the most widely used video coding standard. Its applications include digital television broadcasting, direct satellite broadcasting, DVD, video surveillance, etc. The ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More